2 // System.Web.Configuration.HandlersUtil
5 // Gonzalo Paniagua Javier (gonzalo@ximian.com)
7 // (C) 2002 Ximian, Inc (http://www.ximian.com)
8 // (C) 2005-2009 Novell, inc (http://novell.com)
12 // Permission is hereby granted, free of charge, to any person obtaining
13 // a copy of this software and associated documentation files (the
14 // "Software"), to deal in the Software without restriction, including
15 // without limitation the rights to use, copy, modify, merge, publish,
16 // distribute, sublicense, and/or sell copies of the Software, and to
17 // permit persons to whom the Software is furnished to do so, subject to
18 // the following conditions:
20 // The above copyright notice and this permission notice shall be
21 // included in all copies or substantial portions of the Software.
23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
32 using System.Collections;
33 using System.Configuration;
35 using System.Globalization;
37 namespace System.Web.Configuration
39 sealed class HandlersUtil
45 static public string ExtractAttributeValue (string attKey, XmlNode node)
47 return ExtractAttributeValue (attKey, node, false);
50 static public string ExtractAttributeValue (string attKey, XmlNode node, bool optional)
52 return ExtractAttributeValue (attKey, node, optional, false);
55 static public string ExtractAttributeValue (string attKey, XmlNode node, bool optional,
58 if (node.Attributes == null) {
62 ThrowException ("Required attribute not found: " + attKey, node);
65 XmlNode att = node.Attributes.RemoveNamedItem (attKey);
69 ThrowException ("Required attribute not found: " + attKey, node);
72 string value = att.Value;
73 if (!allowEmpty && value == String.Empty) {
74 string opt = optional ? "Optional" : "Required";
75 ThrowException (opt + " attribute is empty: " + attKey, node);
81 static public void ThrowException (string msg, XmlNode node)
83 if (node != null && node.Name != String.Empty)
84 msg = msg + " (node name: " + node.Name + ") ";
85 throw new ConfigurationException (msg, node);